Comparative scaling analysis of two different sized pilot-scale fluidized bed reactors operating with biomass substrates

Cardoso, João; Silva, Valter; Eusébio, Daniela; Brito, Paulo; Hall, Matthew J.; Tarelho, L.A.C.

doi:10.1016/j.energy.2018.03.090

Cited by 21 publications

(6 citation statements)

References 32 publications

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“…The power plant’s provisioning policy is within the acceptable performance range and does not hinder the attained gas quality . Furthermore, the gasifying performance behavior in dealing with several forestry residues has already been thoroughly studied by research groups in similar fluidized bed gasifiers at various scales. − The biomass collection process is assumed to use cutting and chipping onsite followed by truck transportation to the power plant where storage and processing activities occur. At the power plant, biomass processing integrates multiple sieves to ensure that the fuel meets the granulometry and uniformity required to feed into the gasifier .…”

Section: Methodsmentioning

confidence: 99%

Small-Scale Biomass Gasification for Green Ammonia Production in Portugal: A Techno-Economic Study

et al. 2021

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A renewed interest revolves around ammonia through its synthesis via renewable energy sources, promoting green ammonia as a genuine contender and preeminent carbonfree energy carrier within the hydrogen economy. A National Hydrogen Strategy has already been set by the Portuguese Government, focusing on decarbonizing the national industry, while substantially reducing natural gas and fossil fuel-based ammonia imports. This study delivers a techno-economic assessment of a small-scale green ammonia production facility using biomass gasification in mainland Portugal. An improved economic model combining the net present value (NPV), internal rate of return (IRR), modified internal rate of return (MIRR), payback period (PBP), and discounted payback period (DPBP) is set to determine the project feasibility. A Monte Carlo sensitivity analysis is implemented to gauge the risks associated with the venture. Several environmental considerations are also addressed concerning the carbon footprint of deploying a biomass-to-ammonia system compared to conventional fossil fuel-based ammonia. Under current market conditions, the power plant is predictably economically feasible with an NPV of 3714 k€, IRR of 24.32%, MIRR of 14.99%, PBP of 4.6 years, and DPBP of 5.8 years. The sensitivity analysis foresees affordable risks for investors, although investment loss is more likely to occur due to NPV failure, being remarkably sensitive to ammonia production and ammonia sales price fluctuations. Finally, the geographic location set for the biomass-to-ammonia power plant has the potential to enable a bioeconomy and circular economy framework for increased renewability and improved productivity, while promoting sustainable agricultural practices in the region.

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Section: Methodsmentioning

confidence: 99%

Small-Scale Biomass Gasification for Green Ammonia Production in Portugal: A Techno-Economic Study

et al. 2021

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“…The selected mesh to picture the behavior within the 250 kW th reactor was built with 80808 elements. This mesh quality has already served as the best solution to fulfill the purposes of other published studies by the research group [19]. Additional details on the numerical procedure can be found elsewhere [19].…”

Section: Numerical Proceduresmentioning

confidence: 99%

“…The present model has already been extensively documented in recent literature published by the research group. Further details on the model can be found elsewhere [17,19].…”

Section: Mathematical Modelmentioning

confidence: 99%

Modelling and experimental analysis of a small-scale olive pomace gasifier for cogeneration applications: A techno-economic assessment

Cardoso

Silva

Eusébio

et al. 2019

CI&CEQ

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Article Highlights • A 2-D CFD multiphase model was employed to study olive pomace gasification • The most suitable end-use applications for the produced gas were assessed • The feasibility of performing olive pomace gasification in small-scale was addressed • A Monte Carlo sensitivity analysis was performed Abstract A 2-D numerical simulation approach was implemented to describe the gasification process of olive pomace in a bubbling fluidized bed reactor. The numerical model was validated under experimental gasification runs performed in a 250 kW th quasi-industrial biomass gasifier. The producer gas composition, H 2 / /CO ratio, CH 4 /H 2 ratio, cold gas efficiency and tar content were evaluated. The most suitable applications for the potential use of olive pomace as an energy source in Portugal were assessed based on the results. A techno-economic study and a Monte Carlo sensitivity analysis were performed to assess the feasibility and foresee the main investment risks in conducting olive pomace gasification in small facilities. Results indicated that olive pomace gasification is more suitable for domestic purposes. The low cold gas efficiency of the process (around 20%) turns the process more appropriate for producer gas production in small cogeneration facilities. Olive pomace gasification solutions showed viable economic performance in small cogeneration solutions for agriculture waste-to-energy recovery in olive oil agriculture cooperatives. However, the slender profitability may turn the project unattractive for most investors from a financial standpoint.

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“…Intergovernmental organizations and policymakers are the cornerstones of combating climate change, looking for cost-effective change by shifting toward nonconventional energy sources, for example, the EU emissions trading system (EU ETS) [4]. In this regard, some countries have formally stated a deadline to stop all coal burning.…”

Section: Introductionmentioning

confidence: 99%

Application of the Six Sigma DMAIC Methodology to the Gasification Process

Chavando¹,

Silva²,

Cardoso³

et al. 2024

From Biomass to Biobased Products

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Despite the advantages of gasification over combustion, some elements remain to improve. Fortunately, it is not necessary to reinvent the wheel to improve efficiency and quality because there are already methodologies that have been proven successful with other processes, like the Six Sigma DMAIC methodology. Therefore, this chapter explores the synergies between gasification and Six Sigma DMAIC to improve gas quality and hydrogen production, using RDF and wood as feedstock. Furthermore, the blends and equivalence ratio influence the produced gas is explored.

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Comparative scaling analysis of two different sized pilot-scale fluidized bed reactors operating with biomass substrates

Cited by 21 publications

References 32 publications

Small-Scale Biomass Gasification for Green Ammonia Production in Portugal: A Techno-Economic Study

Small-Scale Biomass Gasification for Green Ammonia Production in Portugal: A Techno-Economic Study

Modelling and experimental analysis of a small-scale olive pomace gasifier for cogeneration applications: A techno-economic assessment

Application of the Six Sigma DMAIC Methodology to the Gasification Process

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